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WEB開発をやり始めてみる(Rails①)

Posted at

やったこと

### コントローラーの作成
$ rails g controller Tasks

### モデルの作成
(DBのカラムを定義しています。titlestring,completedboolean型で保存されます)
$ rails g model Task title:string completed:boolean
/db/migrate/xxxxx.create.tasks.rb
### DBマイグレーションの前に下記のように修正を行う(completedはデフォルトでfalseになる)
class CreateTasks < ActiveRecord::Migration[7.0]
  def change
    create_table :tasks do |t|
      t.string :title
      t.boolean :completed, default: false

      t.timestamps
    end
  end
end
### DBに反映させる
$ rails db:migrate

### DBの中身確認
$ rails db
sqlite> .schema
CREATE TABLE "schema_migrations" ("version" varchar NOT NULL PRIMARY KEY);
CREATE TABLE "ar_internal_metadata" ("key" varchar NOT NULL PRIMARY KEY, "value" varchar, "created_at" datetime(6) NOT NULL, "updated_at" datetime(6) NOT NULL);
CREATE TABLE "tasks" ("id" integer PRIMARY KEY AUTOINCREMENT NOT NULL, "title" varchar, "completed" boolean, "created_at" datetime(6) NOT NULL, "updated_at" datetime(6) NOT NULL);
/config/routes.rb
### ルーティングの設定
(rootでアクセスするとtasks#indexコントローラーが実行ざれる)
Rails.application.routes.draw do
  # Define your application routes per the DSL in https://guides.rubyonrails.org/routing.html

  # Defines the root path route ("/")
  # root "articles#index"
  
  resources :tasks
  root 'tasks#index'
end
/app/controllers/tasks_controller.rb
### 上記のtasksコントローラーの設定を行う
(@tasksに全てのタスクを代入)
class TasksController < ApplicationController
    def index
        @tasks = Task.all
    end
end
/app/views/iendex.html.erb(新規作成)
### <%>の時は何かを実行したい時(表示させたくない)
### <%=>画面に表示させたい時
<h1>Tasksk</h1>
<ul>
    <% @tasks.each do |task| %>
        <li>
            <%= check_box_tag '','' %>
            <%= task.title %>
        </li>
    <% end %>
</ul>
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